I'd go with C, D and F. The main causes of population growth had to do with diet and hygiene and health care.
The Agricultural Revolution (which started in the 17th century) led to better food production and thus better diet and nutrition for people, so healthier lives.
The Industrial Revolution (beginning in the mid 18th century) pushed cities to create better sanitation methods to avoid cholera and other disease epidemics.
And the ongoing advances in medicine ever since the Scientific Revolution were doing their part also to increase lifespans.
The titans were seen as hideous creatures
Because of Medicaid and Medicare, it was the administration of "Lyndon Johnson" that was seen as making great strides in health care, since Johnson wanted to improve the lives of average Americans.
